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220kV three phase transmission line is 60 km long. The resistance is 15 Ohms per phase and the inductance is j 30 Ohms.

1- Calculate : voltage regulation, TL line power losses and efficiency when the line is suppling 315 MW at 0.6 lagging power factor .

 2- Assume that, a capacitor can be installed with the load in parallel to correct (improve) the power factor for 0.85, calculate zise of the required capacitor  and the same parameters which were in part 1
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